d95794ec8a
As many open source projects have started doing it, we're removing the current year from the copyright notice, so that we don't need to bump it every year. It seems like only the first year of publication is technically relevant for copyright notices, and even that seems to be something that many companies stopped listing altogether (in a version controlled codebase, the commits are a much better source of date of publication than a hardcoded copyright statement). We also now list Godot Engine contributors first as we're collectively the current maintainers of the project, and we clarify that the "exclusive" copyright of the co-founders covers the timespan before opensourcing (their further contributions are included as part of Godot Engine contributors). Also fixed "cf." Frenchism - it's meant as "refer to / see".
327 lines
8.5 KiB
C++
327 lines
8.5 KiB
C++
/**************************************************************************/
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/* file_access_unix.cpp */
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/**************************************************************************/
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/* This file is part of: */
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/* GODOT ENGINE */
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/* https://godotengine.org */
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/**************************************************************************/
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/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
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/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur. */
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/* */
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/* Permission is hereby granted, free of charge, to any person obtaining */
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/* a copy of this software and associated documentation files (the */
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/* "Software"), to deal in the Software without restriction, including */
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/* without limitation the rights to use, copy, modify, merge, publish, */
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/* distribute, sublicense, and/or sell copies of the Software, and to */
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/* permit persons to whom the Software is furnished to do so, subject to */
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/* the following conditions: */
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/* */
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/* The above copyright notice and this permission notice shall be */
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/* included in all copies or substantial portions of the Software. */
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/* */
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/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
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/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
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/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. */
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/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
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/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
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/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
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/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
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/**************************************************************************/
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#include "file_access_unix.h"
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#if defined(UNIX_ENABLED)
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#include "core/os/os.h"
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#include "core/string/print_string.h"
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#include <errno.h>
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#include <fcntl.h>
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#include <sys/stat.h>
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#include <sys/types.h>
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#if defined(UNIX_ENABLED)
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#include <unistd.h>
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#endif
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#ifdef MSVC
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#define S_ISREG(m) ((m)&_S_IFREG)
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#include <io.h>
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#endif
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#ifndef S_ISREG
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#define S_ISREG(m) ((m)&S_IFREG)
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#endif
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void FileAccessUnix::check_errors() const {
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ERR_FAIL_COND_MSG(!f, "File must be opened before use.");
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if (feof(f)) {
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last_error = ERR_FILE_EOF;
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}
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}
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Error FileAccessUnix::open_internal(const String &p_path, int p_mode_flags) {
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_close();
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path_src = p_path;
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path = fix_path(p_path);
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//printf("opening %s, %i\n", path.utf8().get_data(), Memory::get_static_mem_usage());
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ERR_FAIL_COND_V_MSG(f, ERR_ALREADY_IN_USE, "File is already in use.");
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const char *mode_string;
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if (p_mode_flags == READ) {
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mode_string = "rb";
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} else if (p_mode_flags == WRITE) {
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mode_string = "wb";
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} else if (p_mode_flags == READ_WRITE) {
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mode_string = "rb+";
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} else if (p_mode_flags == WRITE_READ) {
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mode_string = "wb+";
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} else {
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return ERR_INVALID_PARAMETER;
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}
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/* pretty much every implementation that uses fopen as primary
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backend (unix-compatible mostly) supports utf8 encoding */
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//printf("opening %s as %s\n", p_path.utf8().get_data(), path.utf8().get_data());
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struct stat st = {};
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int err = stat(path.utf8().get_data(), &st);
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if (!err) {
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switch (st.st_mode & S_IFMT) {
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case S_IFLNK:
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case S_IFREG:
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break;
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default:
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return ERR_FILE_CANT_OPEN;
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}
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}
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if (is_backup_save_enabled() && (p_mode_flags == WRITE)) {
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save_path = path;
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path = path + ".tmp";
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}
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f = fopen(path.utf8().get_data(), mode_string);
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if (f == nullptr) {
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switch (errno) {
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case ENOENT: {
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last_error = ERR_FILE_NOT_FOUND;
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} break;
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default: {
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last_error = ERR_FILE_CANT_OPEN;
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} break;
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}
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return last_error;
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}
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// Set close on exec to avoid leaking it to subprocesses.
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int fd = fileno(f);
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if (fd != -1) {
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int opts = fcntl(fd, F_GETFD);
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fcntl(fd, F_SETFD, opts | FD_CLOEXEC);
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}
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last_error = OK;
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flags = p_mode_flags;
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return OK;
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}
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void FileAccessUnix::_close() {
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if (!f) {
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return;
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}
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fclose(f);
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f = nullptr;
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if (close_notification_func) {
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close_notification_func(path, flags);
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}
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if (!save_path.is_empty()) {
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int rename_error = rename((save_path + ".tmp").utf8().get_data(), save_path.utf8().get_data());
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if (rename_error && close_fail_notify) {
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close_fail_notify(save_path);
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}
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save_path = "";
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ERR_FAIL_COND(rename_error != 0);
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}
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}
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bool FileAccessUnix::is_open() const {
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return (f != nullptr);
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}
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String FileAccessUnix::get_path() const {
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return path_src;
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}
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String FileAccessUnix::get_path_absolute() const {
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return path;
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}
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void FileAccessUnix::seek(uint64_t p_position) {
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ERR_FAIL_COND_MSG(!f, "File must be opened before use.");
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last_error = OK;
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if (fseeko(f, p_position, SEEK_SET)) {
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check_errors();
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}
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}
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void FileAccessUnix::seek_end(int64_t p_position) {
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ERR_FAIL_COND_MSG(!f, "File must be opened before use.");
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if (fseeko(f, p_position, SEEK_END)) {
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check_errors();
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}
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}
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uint64_t FileAccessUnix::get_position() const {
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ERR_FAIL_COND_V_MSG(!f, 0, "File must be opened before use.");
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int64_t pos = ftello(f);
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if (pos < 0) {
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check_errors();
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ERR_FAIL_V(0);
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}
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return pos;
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}
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uint64_t FileAccessUnix::get_length() const {
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ERR_FAIL_COND_V_MSG(!f, 0, "File must be opened before use.");
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int64_t pos = ftello(f);
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ERR_FAIL_COND_V(pos < 0, 0);
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ERR_FAIL_COND_V(fseeko(f, 0, SEEK_END), 0);
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int64_t size = ftello(f);
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ERR_FAIL_COND_V(size < 0, 0);
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ERR_FAIL_COND_V(fseeko(f, pos, SEEK_SET), 0);
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return size;
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}
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bool FileAccessUnix::eof_reached() const {
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return last_error == ERR_FILE_EOF;
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}
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uint8_t FileAccessUnix::get_8() const {
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ERR_FAIL_COND_V_MSG(!f, 0, "File must be opened before use.");
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uint8_t b;
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if (fread(&b, 1, 1, f) == 0) {
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check_errors();
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b = '\0';
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}
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return b;
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}
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uint64_t FileAccessUnix::get_buffer(uint8_t *p_dst, uint64_t p_length) const {
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ERR_FAIL_COND_V(!p_dst && p_length > 0, -1);
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ERR_FAIL_COND_V_MSG(!f, -1, "File must be opened before use.");
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uint64_t read = fread(p_dst, 1, p_length, f);
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check_errors();
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return read;
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}
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Error FileAccessUnix::get_error() const {
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return last_error;
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}
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void FileAccessUnix::flush() {
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ERR_FAIL_COND_MSG(!f, "File must be opened before use.");
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fflush(f);
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}
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void FileAccessUnix::store_8(uint8_t p_dest) {
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ERR_FAIL_COND_MSG(!f, "File must be opened before use.");
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ERR_FAIL_COND(fwrite(&p_dest, 1, 1, f) != 1);
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}
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void FileAccessUnix::store_buffer(const uint8_t *p_src, uint64_t p_length) {
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ERR_FAIL_COND_MSG(!f, "File must be opened before use.");
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ERR_FAIL_COND(!p_src && p_length > 0);
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ERR_FAIL_COND(fwrite(p_src, 1, p_length, f) != p_length);
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}
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bool FileAccessUnix::file_exists(const String &p_path) {
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int err;
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struct stat st = {};
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String filename = fix_path(p_path);
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// Does the name exist at all?
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err = stat(filename.utf8().get_data(), &st);
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if (err) {
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return false;
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}
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#ifdef UNIX_ENABLED
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// See if we have access to the file
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if (access(filename.utf8().get_data(), F_OK)) {
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return false;
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}
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#else
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if (_access(filename.utf8().get_data(), 4) == -1) {
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return false;
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}
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#endif
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// See if this is a regular file
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switch (st.st_mode & S_IFMT) {
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case S_IFLNK:
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case S_IFREG:
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return true;
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default:
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return false;
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}
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}
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uint64_t FileAccessUnix::_get_modified_time(const String &p_file) {
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String file = fix_path(p_file);
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struct stat flags = {};
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int err = stat(file.utf8().get_data(), &flags);
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if (!err) {
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return flags.st_mtime;
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} else {
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print_verbose("Failed to get modified time for: " + p_file + "");
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return 0;
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}
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}
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uint32_t FileAccessUnix::_get_unix_permissions(const String &p_file) {
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String file = fix_path(p_file);
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struct stat flags = {};
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int err = stat(file.utf8().get_data(), &flags);
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if (!err) {
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return flags.st_mode & 0x7FF; //only permissions
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} else {
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ERR_FAIL_V_MSG(0, "Failed to get unix permissions for: " + p_file + ".");
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}
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}
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Error FileAccessUnix::_set_unix_permissions(const String &p_file, uint32_t p_permissions) {
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String file = fix_path(p_file);
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int err = chmod(file.utf8().get_data(), p_permissions);
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if (!err) {
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return OK;
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}
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return FAILED;
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}
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CloseNotificationFunc FileAccessUnix::close_notification_func = nullptr;
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FileAccessUnix::~FileAccessUnix() {
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_close();
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}
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#endif // UNIX_ENABLED
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